Winding – tensioning – or guiding – Strand tensioning device – Tortuous course
Patent
1985-05-13
1987-07-07
Jillions, John M.
Winding, tensioning, or guiding
Strand tensioning device
Tortuous course
2421074B, 280806, B60R 2238, B60R 2240
Patent
active
046781340
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to safety belts for passengers in vehicles such as motor cars, aeroplanes and other wheeled vehicles etc. More closely defined, the invention relates to such safety belts as comprise at least one strap roller for winding on and off at least one belt strap as well as at least one locking arrangement which locks the belt strap and prevents further unwinding from the strap roller once a limit value has been exceeded as regards the belt strap speed/acceleration and the acceleration/deceleration/inclination of the vehicle, aeroplane etc. or as regards any other condition such as speed/height etc. at which the belt strap must be locked.
All previously known designs have the disadvantage that they are not equipped quickly and accurately to sense and prevent unwinding from the strap roller once a limit value in respect of a certain condition has been exceeded or reached.
The present invention aims at overcoming the above and other disadvantages of known safety belt systems. This was achieved as soon as the arrangement for a safety belt herewith described and explained below, from which it follows that one main feature of the invention consists in that the belt strap is locked against unwinding with the aid of at least one locking arrangement which is activated when a preselected limit value has been reached or exceeded as regards the speed/acceleration of the belt strap or the acceleration/deceleration/inclination of the vehicle etc.
The invention is described in detail below with reference to the attached drawings and diagrammatic presentations in which
FIG. 1 is a diagrammatic view showing an embodiment of a safety belt arrangement in which a reference surface/surfaces arranged on a strap spindle in accordance with the invention is/are sensed.
FIG. 2 is a diagrammatic view showing an embodiment of a safety belt arrangement in which a reference surface/surfaces arranged on the belt strap in accordance with the invention is/are sensed.
FIG. 2' is a perspective view of the safety belt shown in FIG. 2.
FIG. 3a is an end view of the strap spindle in accordance with the invention.
FIG. 3b is a side view of the strap spindle shown in FIG. 3a.
FIG. 3c is a view showing the opposite end of the strap spindle of FIG. 3a.
FIG. 4a is an end view of the lock casing in accordance with the invention.
FIG. 4b is a side view of the lock casing shown in FIG. 4a.
FIG. 5 is a block diagram illustrating in general terms a strap speed detector in accordance with the invention.
FIG. 6 is a block diagram illustrating a strap speed detector with optical sensing in accordance with the invention.
FIG. 7 is a diagrammatic view of an acceleration/deceleration/inclination detector for vehicles, aeroplanes etc. in accordance with the invention.
FIG. 8 is a block diagram of an acceleration/deceleration/inclination detector in accordance with the invention.
FIG. 9 is a block diagram of a belt take-up detector in accordance with the invention.
FIG. 1 shows a safety belt system comprising (at least) one belt strap (1) which can be wound on to/unwound from a spindle (2) mounted within an appropriately formed frame housing (3), which is secured at the required point in the vehicle. A winding device (4), e.g. a helical spring, is linked with the shaft (2) and arranged to maintain the belt strap (1) wound on to the spindle (2). The free end of the strap is provided with some suitable locking mechanism, e.g. a diagrammatically illustrated male part (5) which can be locked by insertion into a corresponding female part (6), also shown in diagrammatic form and located at a required suitable point in the vehicle. The above parts may be of as such well known design. Strap spindle (2) is provided with at least one reference surface (10), as shown in FIG. 3, which is sensed by a detector (7) arranged in a casing (9) stationary relative to the strap roller.
The reference surface/surfaces (10) can be conductive, surrounded by non-conductive layers and sensed by an appropriate detector such as pickup brushes. The reference surface/s
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patent: 4519652 (1985-05-01), Kamijo
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